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第10章实验12 用多用电表测量电学中的物理量_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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第10章实验12 用多用电表测量电学中的物理量_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第10章实验12 用多用电表测量电学中的物理量_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第10章实验12 用多用电表测量电学中的物理量_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练
第10章实验12 用多用电表测量电学中的物理量_4.2025物理总复习_2024年新高考资料_1.2024一轮复习_2024年高考物理一轮复习讲义(新人教版)_学生版在此文件夹_一轮复习85练

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1.某实验小组在练习使用多用电表时,他们正确连接好电路如图甲所示.闭合开关 S后, 发现无论如何调节电阻箱R ,灯泡都不亮,电流表无示数,他们判断电路可能出现故障. 0 经小组讨论后,他们尝试用多用电表的欧姆挡来检测电路.已知保护电阻R=15 Ω,电流表 量程为0~50 mA.操作步骤如下: ①将多用电表挡位调到欧姆×1挡,再将红、黑表笔短接,进行欧姆调零; ②断开图甲电路开关S,将多用电表两表笔分别接在a、c上,多用电表的指针不偏转; ③将多用电表两表笔分别接在b、c上,多用电表的示数如图乙所示; ④将多用电表两表笔分别接在c、e上,调节R =20 Ω时,多用电表示数如图丙所示,电流 0 表的示数如图丁所示. 回答下列问题: (1)图丙中的多用电表示数为________ Ω;图丁中的电流表示数为________ mA. (2)操作步骤④中,多用电表红表笔应接______(选填“c”或“e”)点. (3)电路的故障可能是________. A.灯泡短路 B.灯泡断路 C.保护电阻R短路 D.保护电阻R断路 (4)根据以上实验得出的数据,还可以计算出多用电表内部电源的电动势 E′=________ V(结果保留三位有效数字). 2.(2023·福建泉州市质检)某同学利用多用电表的欧姆挡进行实验研究.欧姆挡所用电池的 电动势为9 V,刻度盘中央刻度值为“15”,选择旋钮打在“×1 k”挡. (1)该同学用欧姆挡测量某一量程为15 V的电压表内阻. ①指针指在图甲所示位置,此测量值为________ kΩ;查阅资料发现该电压表内阻真实值为 15 kΩ,测量值与真实值偏差较大,可能原因是该同学未进行欧姆调零就直接测量,若此时把两表笔短接,则指针应指在欧姆挡零刻度线的______侧(选填“左”或“右”). ②进行欧姆调零后再测量,多用电表指针恰好指在“15”刻度线,此时电压表示数为 ________ V(结果保留2位有效数字). (2)该同学接着用欧姆挡探测只有一个元件的黑箱,如图乙所示,当两表笔接触黑箱接线柱 a、b时,发现电表指针快速摆向右边后再摆回最左边刻度线,则该元件可能是________. A.电阻 B.电感线圈 C.电容器 D.二极管 3.某实验小组设计了如图(a)所示的欧姆表电路,仅用一节干电池通过控制开关 S,就可使 “欧姆表”具有“×10”和“×100”两种倍率.电路中使用的实验器材如下: 干电池:电动势E=1.5 V,内阻r=1 Ω; 毫安表:满偏电流I=1 mA,内阻R=125 Ω; g g 滑动变阻器R,阻值调节范围足够大; 0 定值电阻R、R 和R,其中R=1 000 Ω; 1 2 3 1 开关S,红、黑表笔各一支,导线若干. (1)按照图(a)连接好电路,表笔1为________(选填“红”或“黑”)表笔. (2)当开关S断开时,将两表笔短接,调节滑动变阻器 R 使电流表达到满偏,此时 R = 0, 0 ________ Ω,“欧姆表”的倍率是______________(选填“×10”或“×100”). (3)闭合开关S使“欧姆表”倍率改变,电阻R =__________ Ω.将两表笔短接,调节滑动变 2 阻器R,使电流表达到满偏. 0 (4)保持开关闭合,在表笔间接入电阻R(图中未画出),电流表指针指向图(b)所示的位置时 3 电阻R=________ Ω. 3 4.(2023·福建省模拟)图甲为一个多用电表欧姆挡内部电路示意图.电流表满偏电流1 mA、 内阻10 Ω;电池电动势1.5 V、内阻1 Ω;(1)图甲中表笔a为________色(选填“红”或“黑”).调零电阻R 可能是下面两个滑动变阻 0 器中的________(填选项序号). A.电阻范围0~200 Ω B.电阻范围0~2 000 Ω (2)在进行欧姆调零后,正确使用该多用电表测量某电阻的阻值,电表读数如图乙所示,被 测电阻的阻值为________ Ω. (3)如图丙所示,某同学利用定值电阻R 给欧姆表增加一挡位“×10”,则定值电阻R = 1 1 ______ Ω.(结果保留1位小数) (4)若该欧姆表换了一个电动势为1.5 V、内阻为10 Ω的电池,调零后测量某电阻的阻值,其 测量结果________.(选填“偏大”“偏小”或“准确”) 5.(2023·浙江省模拟)多用电表是实验室中常用的测量仪器,如图甲所示为多量程多用电表 示意图. 通过一个单刀多掷开关S,接线柱B可以分别与触点1、2、3、4、5接通,从而实现使用多用电表测量不同物理量的功能.图中的E是电池的电动势,R 是电池内阻,R 是欧姆调零 3 6 电阻,A、B分别与黑、红表笔相接.R 、R 、R 、R 都是定值电阻,表头G的满偏电流为 1 2 4 5 20 mA,内阻为R.已知R+R=4R,R=360 Ω,R=1 600 Ω. g 1 2 g 4 5 (1)关于此多用电表,下列说法正确的是______; A.图中B是红表笔 B.当S接触点1或2时,多用电表处于测量电流的挡位,且接1时的量程比接2时大 C.当S接触点3时,多用电表处于测量电阻的挡位,倍率越大,滑动变阻器接入电路的阻 值越大 D.当S接触点4、5时,多用电表处于测量电压的挡位,且接4比接5时量程大 (2)该学习小组将“B”端与“3”相接,将A、B表笔短接,调节R.进行欧姆调零后测量未 6 知电阻.得到通过表头G的电流与被测未知电阻的关系如图乙所示,由此可知多用电表中 电池的电动势E=________ V(计算结果保留三位有效数字).通过分析可知该小组使用多用 电表的________(填“×1”“×10”或“×1k”)倍率的欧姆挡进行测量未知电阻. (3)实验小组用多用电表测量电源的电动势和内阻.器材有:待测电源(电动势约为8 V), 定 值电阻R =8.0 Ω,多用电表一只,电阻箱一只,连接实物如图丙所示,测得并记录多组数 0 据后,得到对应的-图,如图丁所示,则内阻r=________ Ω(结果保留三位有效数字).
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  1. CONNECT:[ UseTime:0.001111s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001822s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000685s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.004051s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001711s ]
  6. SELECT * FROM `set` [ RunTime:0.000739s ]
  7. SHOW FULL COLUMNS FROM `wendang` [ RunTime:0.001527s ]
  8. SELECT * FROM `wendang` WHERE `id` = 373458 LIMIT 1 [ RunTime:0.001251s ]
  9. UPDATE `wendang` SET `liulancishu` = 1 WHERE `id` = 373458 [ RunTime:0.015910s ]
  10. UPDATE `wendang` SET `lasttime` = 1773118222 WHERE `id` = 373458 [ RunTime:0.004070s ]
  11. SELECT * FROM `wendang` WHERE `id` < 373458 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.003602s ]
  12. SELECT * FROM `wendang` WHERE `id` > 373458 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.012768s ]
  13. SELECT * FROM `wendang` WHERE `id` <> 373458 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.006115s ]
  14. SELECT * FROM `wendang` WHERE `id` <> 373458 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.013066s ]
  15. SELECT * FROM `wendang` WHERE `id` <> 373458 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007110s ]
0.186671s